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Wiscasset Town of

Sewage treatment plant, Wiscasset, Maine. NPDES permit ME0100757 expired Aug 31, 2025; its limits still apply. Last 12 months: over a limit 5 times (last September 2026), 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (34 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 1 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
April 2026Enterococci, daily maximum67 #/100mL≤ 54 #/100mL24%
August 2026Coliform, fecal general, daily maximum70 #/100mL≤ 31 #/100mL126%
August 2026Coliform, fecal general, monthly geometric mean14.1 #/100mL≤ 14 #/100mL1%
September 2026Coliform, fecal general, daily maximum58 #/100mL≤ 31 #/100mL87%
September 2026pH, minimum4.7 SU≥ 6 SU—

Limits in force (41)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 155 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 258 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 233 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 50 mg/Lall year
Solids, total suspendedmonthly average≤ 155 lb/dall year
Solids, total suspendeddaily maximum≤ 258 lb/dall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 233 lb/dall year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Cyanide, free [amenable to chlorination]monthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Cyanide, free [amenable to chlorination]monthly averagereport only (ug/L)all year
Cyanide, free [amenable to chlorination]monthly averagereport only (lb/d)Mar, Jun, Sep, Dec
Cyanide, free [amenable to chlorination]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly average≤ .62 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .3 mg/Lall year
Chlordanemonthly averagereport only (ug/L)Mar, Jun, Sep, Dec
Chlordanemonthly averagereport only (ug/L)all year
Chlordanemonthly average≤ .00018 lb/dMar, Jun, Sep, Dec
Chlordanemonthly average≤ .00018 lb/dall year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Analytical Chemistryvaluereport only (N=0;Y=1)all year
Enterococcimonthly average≤ 8 #/100mLApr–Oct
Enterococcidaily maximum≤ 54 #/100mLApr–Oct
Mercury, total [as Hg]monthly average≤ 10.1 ng/Lall year
Mercury, total [as Hg]daily maximum≤ 15.1 ng/Lall year
Coliform, fecal generalmonthly geometric mean≤ 14 #/100mLall year
Coliform, fecal generaldaily maximum≤ 31 #/100mLall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulatadaily minimumreport only (%)all year
NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulatadaily minimumreport only (%)all year
NOAEL Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)daily minimumreport only (%)all year
NOAEL Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)daily minimumreport only (%)all year

How strict are these limits?

Cited limits by parameter: Maine's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ME0100757 · MCP: https://passage-data.com/mcp